duty

noun: Moral topic

[countable,uncountable]something that you feel you have to do because it is your moral or legal responsibilityIt is my duty to report it to the police.Local councillors have a duty to serve the community.I don't want you to visit me simply out of a sense of duty.your duties as a parentto do your duty for your countryI’ll have to go I’m afraid—duty calls.The company owes a duty of care to its customers.